How to Refill Refrigerant in a Compressor: A Step-by-Step Guide

To re-pressurize the compressor and put refrigerant back in, use a vacuum pump to evacuate the system, then use a charging scale and hose to inject the correct amount of refrigerant.

How To Pump Refrigerant Back Into Compressor

Pumping refrigerant back into a compressor can be a challenging task, but with the right steps and proper preparation, it can be a relatively straightforward process. To start, make sure that all safety protocols are followed and that all proper equipment is available. In order to ensure the refrigerant is properly pumped back into the compressor, an evacuation pump must be used to remove any trace amounts of gaseous refrigerant from the system, followed by a recovery cylinder being connected in order to capture any liquid residuals. Once this step is complete then the evaporator can safely be disconnected, as well as its connected tubes. With these steps completed and safety protocols adhered to, the suction line of the compressor needs to be opened in order to allow refilling of the system with refrigerant liquid while also relying on a gauge manifold in order to measure both pressure and temperature. When properly balanced, the technician can then carefully concentrate on recharging the system of refrigerant accordingly. Following these steps will ensure that your system is back up and running in no time.

Preparation for Refrigerant Pumping

Before beginning the process of pumping refrigerant into a compressor, it is important to gather all the safety equipment and materials required for the job. This includes safety glasses, gloves, and other protective gear. It is also important to have the necessary tools and supplies on hand such as an AC gauge set, hoses, refrigerant oil, and other components. Once everything is in place, you can begin the process of pumping refrigerant back into your compressor.

Disconnect Compressor from Unit

The first step in pumping refrigerant back into a compressor is to disconnect it from the unit. To do this safely, it is important to label all wires so that they can be reconnected easily after the process has been completed. Also locate any isolation or shutoff valve that may be present. This valve should be closed before further work can be done.

Shut Off Refrigerant Supply

Once the compressor has been disconnected from the unit, it is important to shut off the refrigerant supply by finding any cap or plunger associated with the isolation valve. Once these have been located, close both of them firmly in order to prevent any further leakage of refrigerant.

Drain Oil from Tank

In order to ensure a safe installation of a new compressor, it is important to drain all oil from the tank prior to reconnection of lines. To do this safely and effectively locate the outlet assembly at the bottom of your tank and detach it with a drain pan placed underneath it in order to capture any remaining oil left inside.

Unhook Lines Between Compressor and Tank

After draining your tank of oil, you will need to unhook lines between your compressor and tank in order for them to be securely connected again once you have finished recharging with refrigerant. To do this safely remove suction line flange nut while holding compressor in place and unscrew liquid line flange nut while holding tank in place securely.

Remove Old Refrigerant

Removing old refrigerant from the compressor is an essential step in the process of pumping it back into the system. To do this, you will need to connect a recovery machine to the suction port on the compressor and operate it to evacuate the system. It is important to make sure that all of the old refrigerant has been completely removed before proceeding with the next steps.

Replace Screens, ORings, Receiver Drier & Expansion Valves

Once all of the old refrigerant has been removed from the system, you can begin replacing any parts that may require it. This includes screens, ORings, receiver drier, and expansion valves which are all components necessary for efficient performance. It is important to ensure that any new parts you use are compatible with your existing system components before proceeding.

Connect Lines on Compressor & Tank

The next step is to connect all of the lines on both the compressor and tank together using ORings and flange nuts. It is essential that you handle these components carefully as they are sensitive and can be easily damaged if not handled properly. Make sure to take all necessary precautions while connecting these components together.

Add Oil Back into Tank

Finally, you need to add oil back into your tank in order to lubricate all of your system components. You will need a calibrated ounce marking tool in order to measure out how much oil needs to be added back into your tank. Be sure to use only oil recommended by your manufacturer for optimal performance results.

FAQ & Answers

Q: What safety equipment is necessary for refrigerant pumping?
A: It’s important to have the right safety equipment on hand when performing refrigerant pumping. This includes protective eyewear, gloves, and a respirator or face mask to protect from potential exposure to hazardous chemicals.

Q: How do I disconnect the compressor from the unit?
A: Before disconnecting the compressor from the unit, it’s important to label the wires so that they can be easily reconnected. Then you’ll need to locate and shut off the isolation or shutoff valve.

Q: How do I drain oil from the tank?
A: In order to drain oil from the tank, you’ll need to locate the outlet assembly at the bottom of the tank and detach it with a drain pan.

Q: How do I replace screens, ORings, receiver drier & expansion valves?
A: Identify which parts require replacement and replace them with new ones that are compatible with existing system components. Be sure to check compatibility before installing any new parts.

Q: How do I add oil back into the tank?
A: Before adding oil back into the tank, use calibrated ounce markings on your container to measure out how much is required. Make sure you use an oil type recommended by the manufacturer for best results.

In conclusion, it is important to remember that when pumping refrigerant back into a compressor, it is important to use the correct equipment and procedures to ensure the refrigerant does not leak or cause any damage to the system. Additionally, it is important to use the right type of refrigerant for the particular system and to follow all safety guidelines in order to prevent any hazardous situations. With proper knowledge, the process of pumping refrigerant back into a compressor can be done safely and effectively.